// symbol.cpp - Symbol's implementation of functions

#include <qobject.h>
#include <iostream.h>
#include <math.h>

#include "render2d.h"
#include "drawable.h"
#include "symbol.h"
#include "bondedit.h"
#include "defs.h"

// XPM files defining symbols
#include "symbol_xpm.h"
// end symbol defs

Symbol::Symbol(Render2D *r1, QObject *parent, const char *name)
  : Drawable(parent, name)
{
  r = r1;
  highlighted = false;
  offset = QPoint(0,0);
  need_offset = false;
}

void Symbol::SetSymbol(QString n) { 
  which = n; 
  // load symbol
  if (which == "sym_plus") {
    originalRegular = QPixmap(sym_plus_xpm);
    rotateRegular = QPixmap(sym_plus_xpm);
    originalHighlighted = QPixmap(hl_sym_plus_xpm);
    rotateHighlighted = QPixmap(hl_sym_plus_xpm);
    return;
  }
  if (which == "sym_minus") {
    originalRegular = QPixmap(sym_minus_xpm);
    rotateRegular = QPixmap(sym_minus_xpm);
    originalHighlighted = QPixmap(hl_sym_minus_xpm);
    rotateHighlighted = QPixmap(hl_sym_minus_xpm);
    return;
  }
  if (which == "sym_delta_plus") {
    originalRegular = QPixmap(sym_delta_plus_xpm);
    rotateRegular = QPixmap(sym_delta_plus_xpm);
    originalHighlighted = QPixmap(hl_sym_delta_plus_xpm);
    rotateHighlighted = QPixmap(hl_sym_delta_plus_xpm);
    return;
  }
  if (which == "sym_delta_minus") {
    originalRegular = QPixmap(sym_delta_minus_xpm);
    rotateRegular = QPixmap(sym_delta_minus_xpm);
    originalHighlighted = QPixmap(hl_sym_delta_minus_xpm);
    rotateHighlighted = QPixmap(hl_sym_delta_minus_xpm);
    return;
  }
  if (which == "sym_2e") {
    originalRegular = QPixmap(sym_2e_xpm);
    rotateRegular = QPixmap(sym_2e_xpm);
    originalHighlighted = QPixmap(hl_sym_2e_xpm);
    rotateHighlighted = QPixmap(hl_sym_2e_xpm);
    return;
  }
  if (which == "sym_1e") {
    originalRegular = QPixmap(sym_1e_xpm);
    rotateRegular = QPixmap(sym_1e_xpm);
    originalHighlighted = QPixmap(hl_sym_1e_xpm);
    rotateHighlighted = QPixmap(hl_sym_1e_xpm);
    return;
  }
}

void Symbol::SetRotate(double d) {
  rotation = d; 
  // if text symbol, don't rotate
  if (which == QString("sym_delta_plus")) return;
  if (which == QString("sym_delta_minus")) return;
  if (which == QString("sym_minus")) return;
  // rotate symbol
  QWMatrix rm;
  rm.rotate(d);
  rotateRegular = originalRegular.xForm(rm);
  rotateHighlighted = originalHighlighted.xForm(rm);
}

QString Symbol::ToXML(QString xml_id) {
  QString s, n1;

  // begin symbol
  s.append("<symbol id=");
  s.append(xml_id);
  s.append(">\n");

  // write Start
  s.append("<Start>");
  n1.setNum(start->x);
  s.append(n1);
  s.append(" ");
  n1.setNum(start->y);
  s.append(n1);
  s.append("</Start>\n");

  // write symbol code
  s.append("<symtype>");
  s.append(which);
  s.append("</symtype>\n");

  // write color
  s.append("<color>");
  n1.setNum(color.red());
  s.append(n1);
  s.append(" ");
  n1.setNum(color.green());
  s.append(n1);
  s.append(" ");
  n1.setNum(color.blue());
  s.append(n1);
  s.append("</color>\n");

  // end symbol
  s.append("</symbol>\n");

  return s;
}

// set Symbol from XDrawChem-format XML
void Symbol::FromXML(QString xml_tag) {
  int i1, i2;

  i1 = xml_tag.find("<Start>");
  i2 = xml_tag.find("</Start>") + 8;
  SetStartFromXML(xml_tag.mid(i1, i2 - i1));
  i1 = xml_tag.find("<symtype>") + 9;
  i2 = xml_tag.find("</symtype>");
  SetSymbol(xml_tag.mid(i1, i2 - i1));
  i1 = xml_tag.find("<color>");
  i2 = xml_tag.find("</color>") + 8;
  SetColorFromXML(xml_tag.mid(i1, i2 - i1));
}

void Symbol::Render(void)
{
  QPoint p1 = start->toQPoint();
  p1.setX(p1.x() + offset.x() - 8);
  p1.setY(p1.y() + offset.y() - 8);
  if (highlighted)
  r->drawPixmap(p1, rotateHighlighted);
  else
  r->drawPixmap(p1, rotateRegular);
}

void Symbol::Edit() {
  int lsty;
  if (which == "sym_plus") lsty = SYM_PLUS;
  if (which == "sym_minus") lsty = SYM_MINUS;
  if (which == "sym_delta_plus") lsty = SYM_DELTA_PLUS;
  if (which == "sym_minus") lsty = SYM_DELTA_MINUS;
  if (which == "sym_2e") lsty = SYM_2E;
  if (which == "sym_1e") lsty = SYM_1E;
  BondEditDialog be(r, "symbol editor", start, end, TYPE_SYMBOL, 0, 0, 0, 
		    lsty, color);
  if ( !be.exec() ) return;
  cout << "change" << endl;
  lsty = be.Style();
  if (lsty == SYM_PLUS) SetSymbol("sym_plus");
  if (lsty == SYM_MINUS) SetSymbol("sym_minus");
  if (lsty == SYM_DELTA_PLUS) SetSymbol("sym_delta_plus");
  if (lsty == SYM_DELTA_MINUS) SetSymbol("sym_delta_minus");
  if (lsty == SYM_2E) SetSymbol("sym_2e");
  if (lsty == SYM_1E) SetSymbol("sym_1e");
}

int Symbol::Type(void)
{
  return TYPE_SYMBOL;
}

bool Symbol::Find(DPoint *target) {
  if (start == target) return true;
  return false;
}

// Do not allow connections to this object.
// Simplest way to do this, I think, is to disallow this function
DPoint * Symbol::FindNearestPoint(DPoint *target, double &dist) {
  dist = 99999.0;
  return 0;
}

Drawable * Symbol::FindNearestObject(DPoint *target, double &dist) {
  if (WithinBounds(target))
    dist = 0.01;
  else
    dist = 99999.0;
  return this;
}

bool Symbol::WithinBounds(DPoint *target) {
  tmp_pt = new DPoint(start->x, start->y);
  tmp_pt->x = tmp_pt->x + offset.x();
  tmp_pt->y = tmp_pt->y + offset.y();
  if (tmp_pt->distanceTo(target) < 8.0)
    return true;
  else
    return false;
}

void Symbol::setPoint(DPoint *s) {
  start = s;
}

QRect Symbol::BoundingBox() {
  if (highlighted == false)
    return QRect( QPoint(999,999), QPoint(0,0) ); 
  int top, bottom, left, right, swp;
  top = (int)start->y + offset.y() - 8;
  left = (int)start->x + offset.x() - 8;
  bottom = (int)start->y + offset.y() + 8;
  right = (int)start->x + offset.x() + 8;
  if (bottom < top) { swp = top; top = bottom; bottom = swp; }
  if (right < left) { swp = left; left = right; right = swp; }
  return QRect( QPoint(left,top), QPoint(right,bottom) );
}

bool Symbol::WithinRect(QRect n, bool shiftdown) {
  tmp_pt = new DPoint(start->x, start->y);
  tmp_pt->x = tmp_pt->x + offset.x();
  tmp_pt->y = tmp_pt->y + offset.y();
  if (n.contains(tmp_pt->toQPoint(), true))
    highlighted = true;
  else
    highlighted = false;
  return highlighted;
}